Biphoton spectral quantum interference for information processing and delay metrology

Conference · Wed Mar 01 04:00:00 EST 2023

DOI:https://doi.org/10.1117/12.2656881· OSTI ID:1968685

Seshadri, Suparna ^[1]; Lu, Hsuan-Hao ^[2]; Lukens, Joseph ^[2]; Weiner, Andrew M. ^[1]

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1. Purdue University
2. ORNL

Broadband time-energy entangled photons feature strong temporal correlations with potential for precision delay metrology, but previous work has leveraged only time-of-flight information ultimately limited by the detection jitter and resolution of the time-tagging electronics. Firstly, our work pushes the entanglement-based nonlocal delay metrology from the conventional time-of-flight measurement to a new direction—two-photon interferometry with subpicosecond sensitivity independent of detection resolution. Next, we show the selective sensitivity of frequency-bin encoded Bell states to the sum and difference of biphoton-delays by using a novel reconfigurable setup capable of switching between the Bell states by successively employing single and dual spectral-line pumps.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1968685
• Country of Publication: United States
• Language: English